Senior Infrastructure Engineer - AI Security, On-Prem Focus

Cogent Security; San Francisco (CA); On-site; USD 100,000 - 300,000; Full time

Job summary

Cogent Security in San Francisco seeks a Senior+ Infrastructure Engineer to build a secure, reliable, cost-effective foundation for Cogent’s products and services. You’ll join a small Core Platform pod and work hands-on across data platform, security systems, and the platform layer used by our agents to build and ship the product.

This early-stage, high-ownership role requires a candidate who has built core infrastructure at startup scale and can coordinate across many stakeholders.

Qualifications

• 5-7 years of software engineering experience with deep core infrastructure expertise.
• Hands-on AWS experience.
• Experience with Clickhouse Cloud at the serving layer.
• Real depth in Spark and micro-batching.
• Track record of driving large-scale projects across multiple stakeholders.
• Experience building in an AI-forward capacity, with agentic coding fundamentals.
• Startup or early-stage background (up to ~200 people).

Responsibilities

• Build and optimize our data platform, with a focus on storage-level optimizations across Clickhouse and Postgres.
• Make our product deployable on-prem to unlock onboarding for large customers.
• Harden our security systems.
• Build an agent-first infra and platform layer for the product and agents.
• Drive large-scale infrastructure projects end-to-end across stakeholders.

Skills

Software engineering

AWS experience

Clickhouse Cloud

Spark

Agentic coding fundamentals

Startup background

Tools

Clickhouse

PostgreSQL

Spark

Job description

Cogent Security in San Francisco seeks a Senior+ Infrastructure Engineer to build a secure, reliable, cost-effective foundation for Cogent’s products and services. You’ll join a small Core Platform pod and work hands-on across data platform, security systems, and the platform layer used by our agents to build and ship the product.

This early-stage, high-ownership role requires a candidate who has built core infrastructure at startup scale and can coordinate across many stakeholders.